Nonglare lighting equipment



Feb, 23,1943. c. R. BQCHET 2,311,927

NONGLARE LIGHTING EQUIPMENT Filed July 26, 1941 2 Sheets-Sheet l 39 F15. i Alon-re/Vecy) 36 zaL'' (s1 sa (27 35 7 "x 4m? r 1 .1

INVENTR, lConrad Buche Feb. 23, 1943. c. R. BUCHET v NONGLARE LIGHTING EQUIPMENT Filed July 26, 1941 2 Sheets-Sheet 2 Patented Feb. 23, 1943 UNITED sm'resv 'rear ortica N NONGLAPLEv 'LIGHTING ,EQUIPMENT Conrad R. Buchet, Los Angeles, Calif.; assignor to Darrell Marsden DoWding, Los Angeles,` Calif.

3. Claims.,

This invention relates to non-glarelighting equipment.

The general object of the invention is to provide an improved non-glare lighting. device of a portable or xednature in which the parts are so constructed that a maximum of light and a minimum of glare is present whenthe device isv used.

Another object of the invention is to provide a lighting device wherein a lament and a reflector member are employed and wherein light passes -from the lament through a lens member which causes the light to converge to spaced locations and wherein adjacent to the place of convergence a second lens member is mounted which includes parallel alternate opaque and transparent portions with the light passing through the transparent portions.

A more specic object of the invention is to provide a lighting device particularly adapted for lighting an airport wherein novel means is provided for preventing glare from the light.

A further object of the invention is a novel combined diiusion and light directing member.

Another object of the invention is a novel lensmember including alternate spaced parallel opaque and transparent portions,

Another object of the invention is to provide a lighting device including a novel pivotally mounted light member and including novel meansrfor moving the member.

Other objects and advantagesof the invention will be apparent from the following description taken in connection with the accompanying drawings, wherein:

Fig, 1 is a fragmentary, sectional, side elevation of a lighting device embodying the features of my invention;

Fig. 2 is a front elevation on a reduced scale;

Fig. 3 is a side elevation view, partly diagram` matic on a reduced scale; and

Fig. 4 is a fragmentary sectional side elevation of a modification of my invention.

Referring-to the drawings by referencecharacters I have shown my invention as embodied in a lighting device which is indicated generally yat Ill. As shown, the device is mounted on a basev I I which includes an upwardly extending portion I2 thereon. Mounted on the'base II Ir show' a pair of legs I3 each of which includes a foot'portion I4 secured as by rivets I5 to the baseII. At their upper ends the legs I3 are welded as at I6 to the exterior of a housing I1. As shown the interior of the housing at the rear is concave and preferably includes an interior reflecting surface I8 at the rear thereof and a nonereflecting interior surface I8 at the forward portion thereof.

The housing includes an aperture I9 through which the socket 20 of a lamp 2| extends. The

lamp includes a rectilinear, elongated, filament 22A which is preferably horizontally disposed. The filament 22 is shown as connected by leads 23 and'24 with a source of current 25 and with a switch 26, the construction being such that when the switch 26 is closed the lament 22 is lighted;

Mounted Within the housing I1 I show a light transmitting assembly Which includes a casing 21 which is preferably cylindrical and is providedA with an annular collar 23 at the inner end thereof. The collar 28 includes a shoulder 29. Arranged in the collar 28 and engaging the shoulder 291 show a light transmitting element 30. A sleeve 3| engages the inner face of the elefment 3G. adjacent the outer periphery thereof. The sleeve 3| includesout-struck bosses 32 which space-it from the casing 21. At the end of the casing 21 remote from the element 3i! show a second light transmitting element and is also engaged by a split retaining ring 34 which seats inf-a bead 35V in the casingy21.

'Ihe forward end of the housing I1 includes flange 36 against which a transparent closure member 31 is held by a split ring 38 arranged in a bead 39 in the flange 36.

As shown in Figs. 1, 2, and 3 the casing 21 is provided with diametrically opposed outwardly directed pins 4!) which are welded in place as at 4I. The pins 45 extend outwardly through circular apertures 42 in the housing I1. To the outer ends of each pin IMI secure a depending arm 43. The lower ends of the arms 43 are connected by a transversely extending rod 44 which is pivotally connected intermediate its length, as at 45 to one end of a link 45. The other end of the link 43 is pivotally connected to an'V arm 41 secured to a movable end plate 43 of a bellows 49. The iixed end of the bellows 49'issecuredto the upwardly extending portion I2 ofthe base II.

One end of a guide rod 5i) is secured as by welding-to the upwardly extendingportion I2 at each side ofthe bellows :49v and slidably extends through an aperture 58' in the movable plate 48; The other end of each'rod 5E! is secured to an upturned tongue I2 extending from the base II. About each guide rod 53 I mount a compression spring 5I. One end of each compression spring 5I engages the upturned tongue I2 and the other end of each spring engages the movable plate 43.

As shown in Fig. 3 the upwardly extending portion I2 includes an internally threaded boss 52 thereon in which is secured a conduit 53 which communicates with the interior ofthe bellows. The other end of the conduit 53 cornmunicates with the interior of a liquid storage tank 54. The liquid in the tank is maintained under pressure by compressed air supplied light diiusing depressions 53.

through an air intake 55 at the upper end thereof which connects to an air pump 56. The conduit 53 includes a control valve 5l intermediate the length thereof. The valve 51 may be conveniently disposed near the switch 2S.

'I'hus it may be seen that as the valve 51 is opened, the bellows will expand thus pushingy forward the link 45 and thereby rotating the arms 43 and through the medium of pins 40 rotating the light transmitting assembly within the housing l1. When the valve 51 is operated to reduce the pressure the bellows will contract by means of compression springs 5l thus rotating the light transmitting assembly in the opposite direction.

The outer portions of the rear face of the light transmitting element 3i) includes a plurality of The central portion of the rear face of element Si! is preferably planar as at 59. The front or inner face of the element 3i] includes a plurality of sets of horizontally disposed light condensing, rib forming lens surfaces 69. The ribs of the upper set is of intermediate width, the second set is narrower, the third set of the same width as the rst set and the lower set has wider ribs than any ofthe other sets.

'Ihe-lens-.surfacea as shown in Fig. l, are truncated as at 6i leaving only the upper half of each lens surface thus directing light horizontally transmitted through element 39 only in a horizontal or downward direction. The second light transmitting element 33 on each face thereof includes horizontally disposed raised clear glass portions 62 which are each of a width substantially equal to the width of and disposed in the path of the refracted light waves which were horizontally transmitted through the element 3o (see Fig. 1). The remaining depressed portions 53 of each face of the element 33 is ground and thus rendered opaque to prevent light passing therethrough.

Thus it may be seen that the light passing through elements Ji@ and 33 is directed only in a horizontal or downward path when the light transmitting assembly is in a vertical position as shown in Fig. 1.

In Fig. 4 I show a modiiication of my invention which is substantially similar to that shown in Figs. l, 2, and 3 inclusive with the exception of the rear face of the front light transmitting element. As shown, within the sleeve 3i I arrange a series of .horizontally extending T-shaped bars B4 which extend across the front thereof and are secured as by adhesive to the rear face of front element 33' in alignment with the depressed, ground-glass portions 65 of the front face of element 33. The T-bars E54 are of nonlight-transrnitting material such as metal, thus obstructing the passage of any light incidental thereto.

Thus it may be seen that this construction also permits the transmission of light only in a horizontally or downwardly directed path when the light transmitting assembly is in a vertical position as shown in Fig. 4.

From the foregoing it will be apparent that I have invented a novel non-glare lighting equipment which can be economically manufactured and which is highly efficient for the intended purpose.

Having thus described my invention, I claim: 1. In a lighting device, a base, a leg on said base, a housing secured to said leg, a light transmitting member within said housing, said member including a casing, said casing having an .outwardly directed pin thereon, said housing having an aperture, said pin extending through said aperture, a depending arm mounted on said pin, a link, means connecting the lower portion of said arm to said link, a bellows mounted on said base, said bellows having an end plate thereon, said link being secured to said end plate, a

guide rod on said base, a tongue on said base and engaging said guide rod, spring means normally urging said bellows end plate in one direction, a boss on said upwardly extending portion and a conduit communicating with the interior of said bellows.

2. In a lighting device, a base, a pair of legs secured to said base, said legs being spaced apart, a housing secured to said legs, a light transmitting member within said housing, said member including a casing, said casing having aligned outwardly directed pins thereon, said housing having apertures, said pins extending through said apertures. a depending arm mounted on each of said pins, a rod connecting the lower portion of each of said arms, a link having one end pivotally connected to said rod, a bellows mounted on said base, said bellows having an end plate thereon, the other end of said link being secured to said end plate, a guide rod on said base and coaxial with said bellows, a tongue on said base and engaging said guide rod, a spring on said guide rod, said spring having one end engaging said tongue and the other end engaging said bellows end plate, a boss on said upwardly extending portion and a conduit communicating with the interior of said bellows.

3. In a lighting device,.a base having an upwardly extending portion at one end thereof, a

.pair of legs `each having a foot portion secured to said base, said legs being spaced apart, aA

housing secured to said legs and extending above the legs, said housing having an arcuate rear portion and a cylindrical forward portion, a light transmitting member within said housing, said member including a cylindrical casing, said casing having aligned outwardly directed pins thereon, said housing having apertures, said pins extending through said apertures, a depending arm mounted on each of said pins, a rod connecting the lower portion of each of said arms, a link having one end pivotally connected to said rod, a bellows mounted on said upwardly extending portion of said base, said bellows having an end plate thereon remote from said upwardly extending portion, the other end of said link being secured to said end plate, a guide rod on said upwardly extending portion and disposed coaxial with said bellows, a tongue on said base and engaging said guide rod, a springV on said guide rod, said spring having one end engaging said tongue and the other end engaging said bellows end plate, a boss on said upwardly extending portion, a conduit mounted on said boss, said conduit communicating with the interior of said bellows and means to control passage of fluid through said conduit. v

CONRAD R. BUCHET. 

